Why isn’t Twitter more secure?

A trader at the New York Stock Exchange, where a hacker’s tweet about a White House bombing sent the Dow Jones average plummeting briefly Tuesday. AP photo

In another chapter of Twitter account hackings, the Associated Press found its stream tweeting — falsely — that there had been explosions at the White House.

For a brief instant, the Dow plunged 140 points.

How the hackers — Syrian activists — got control is not entirely known. But what is fact is that Twitter is behind the times in terms of security. Google, Apple and even old Microsoft use two-factor authentication, a far stronger form of security than a simple password.